Washington (AFP)

The epidemic of pulmonary diseases related to vaping continues in the United States, the number of cases from 380 to 530 in the country, with an unchanged number of seven deaths, according to the weekly report released Thursday by the health authorities.

More than half of the patients are under 25 years old, and three-quarters are men, said Anne Schuchat, Centers for Disease Control and Prevention. 16% of patients are under 18 years old.

The FDA Drug Agency's analytical laboratories are in possession of more than 150 suspect samples, but have yet to identify the substance or substances responsible for these acute lung diseases, said Mitch Zeller, director of the Center for Disease Control. tobacco to the FDA.

"There is no common denominator about the product (s) used, how they are used, where they were purchased, and what may have happened between the moment the user gets them and the moment they are sprayed. and inhaled, "insisted Mitch Zeller.

Investigators are very cautious about the possible cause of the diseases, be it a brand, a product, or a source.

In many cases, the refills involved contained THC, the psychoactive principle of cannabis. These refills are mostly bought from dealers in the street or on the internet, since cannabis remains illegal in a part of the United States.

There may also be counterfeit refills, with poorly controlled ingredients.

The FDA tests the samples to identify what nicotine or THC has been cut with, as well as diluents, other additives, pesticides, poisons and toxins.

The criminal investigation bureau of the federal agency is now involved, said Mitch Zeller.

In July, the health authorities realized that something was happening in connection with vaping, with many young people suffering from severe breathing difficulties, coughs, chest pains and even nausea.

Most said they had vapoted cannabis liquids, but some said they used only nicotine liquids.

Meanwhile, Michigan and New York have decided to ban flavored electronic cigarettes, mainly because the flavors are attractive to young people. Tobacco e-cigarettes remain permitted.

India, on the other hand, banned all e-cigarettes this week.

"This is a complex investigation, so do not expect definitive answers imminently," said Anne Schuchat.

© 2019 AFP